Patent US4365775A successfully refreshed from Google Patents.
US4365775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cowl structure alignment and shear device
Assignee: Boeing Co
•
Filing: 1980-12-08
•
Granted: 1982-12-28
•
Expires: 2000-12-08
Abstract
Abstract An improved latch for aligning and securing together a pair of hinged cowlings surrounding an aircraft engine. The latch not only holds the cowlings together during thrust and reverse thrust loads, but also absorbs shear loads placed thereon by the aircraft.
Inventors
- 👤 Jerry L. Glancy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:56
CPC Classifications
B; B64; B64D; B64D29/00; B64D29/06; E; E05; E05B; E05B41/00; E05C; E05C19/00; E05C19/10; E05C19/12; E05C19/14; E05C19/145; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/0911; Y10T292/0913; Y10T292/0914; Y10T292/0917
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
177 words
An improved latch for securing together a pair of hinged cowlings surrounding an aircraft engine, the latch comprising: a mounting plate secured to one of the hinged cowlings; a latch keeper secured to the mounting plate and extending outwardly therefrom; a latch housing secured to the other hinged cowling, the latch housing having a mounting plate opening therein, the opening dimensioned so the sides of the opening bear against the sides of the mounting plate when the mounting plate is received therein, the mounting plate opening being sufficient in size to receive the mounting plate therein so the hinged cowlings may be disposed adjacent to each other when in a latched position, the mounting plate having sides with the edge of the sides of the mounting plate beveled for ease in guiding the mounting plate into the mounting plate opening when the hinged cowlings are secured together; and means for releasably engaging the keeper and securing the cowlings together during the operation of the aircraft, the means for releasable engaging the keeper attached to the latch housing.
Claim 2
Dependent Claim
177 words
An improved latch for securing together a pair of hinged cowlings surrounding an aircraft engine, the latch comprising: a mounting plate secured to one of the hinged cowlings; a latch keeper secured to the mounting plate and extending outwardly therefrom; a latch housing secured to the other hinged cowling, the latch housing having a mounting plate opening therein, the opening dimensioned so the sides of the opening bear against the sides of the mounting plate when the mounting plate is received therein, the mounting plate opening being sufficient in size to receive the mounting plate therein so the hinged cowlings may be disposed adjacent to each other when in a latched position, the mounting plate having sides with the edge of the sides of the mounting plate beveled for ease in guiding the mounting plate into the mounting plate opening when the hinged cowlings are secured together; and means for releasably engaging the keeper and securing the cowlings together during the operation of the aircraft, the means for releasable engaging the keeper attached to the latch housing.
Claim 3
Dependent Claim
18 words
The latch as described in claim 1 wherein the sides of the mounting plate are semi-circular in shape.
Claim 4
Dependent Claim
42 words
The latch as described in claim 2 wherein the sides of the mounting plate opening are semi-circular in shape so the sides of the opening mate and bear against the sides of the mounting plate when the mounting plate is received therein.
Claim 5
Dependent Claim
15 words
The latch as described in claim 1 wherein the latch keeper is an eye bolt.
Claim 6
Dependent Claim
32 words
The latch as described in claim 4 wherein the means for releasably engaging the latch keeper is a latch hook pivotally mounted on the latch housing for releasably engaging the eye bolt.
Claim 7
Dependent Claim
177 words
An improved latch for securing together a pair of hinged cowlings surrounding an aircraft engine, the latch comprising: a mounting plate secured to one of the hinged cowlings; a latch keeper eye bolt secured to the mounting plate and extending outwardly therefrom; a latch housing secured to the other hinged cowling, the housing having a mounting plate opening therein, the opening dimensioned so the sides of the opening bear against the sides of the mounting plate when the mounting plate is received therein, the mounting plate opening being sufficient in size to receive the mounting plate therein so the hinged cowlings may be disposed adjacent to each other when in a latched position, the mounting plate having sides with the edge of the sides of the mounting plate beveled for ease in guiding the mounting plate into the mounting plate opening when the hinged cowlings are secured together; and a latch hook pivotally mounted on the latch housing and releasably engaging the latch keeper eye bolt for securing the cowlings together during the operation of the aircraft.
Claim 8
Dependent Claim
177 words
An improved latch for securing together a pair of hinged cowlings surrounding an aircraft engine, the latch comprising: a mounting plate secured to one of the hinged cowlings; a latch keeper eye bolt secured to the mounting plate and extending outwardly therefrom; a latch housing secured to the other hinged cowling, the housing having a mounting plate opening therein, the opening dimensioned so the sides of the opening bear against the sides of the mounting plate when the mounting plate is received therein, the mounting plate opening being sufficient in size to receive the mounting plate therein so the hinged cowlings may be disposed adjacent to each other when in a latched position, the mounting plate having sides with the edge of the sides of the mounting plate beveled for ease in guiding the mounting plate into the mounting plate opening when the hinged cowlings are secured together; and a latch hook pivotally mounted on the latch housing and releasably engaging the latch keeper eye bolt for securing the cowlings together during the operation of the aircraft.
Claim 9
Dependent Claim
26 words
The latch as described in claim 6 wherein the sides of the mounting plate and the sides of the mounting plate opening are semi-circular in shape.
Claim 10
Dependent Claim
30 words
The latch as described in claim 7 further including a semi-circular bushing attached to the sides of the mounting plate opening for bearing against the sides of the mounting plate.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-27 | 1986-06-28 | 1986-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-27 | 1990-06-28 | 1990-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-27 | 1994-06-28 | 1994-12-28 | $7700.00 | Window Closed / Lapsed |